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Firebug Watch Expression Not Working

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Or is it? Function.prototype.debug = function(){ var fn = this; return function(){ if (debugme) debugger; return fn.apply(this, arguments); }; }; javascript debugging firebug share|improve this question edited Nov 29 '11 at 14:19 asked Nov I went to the Script tab of Firebug and opened the Watch pane and entered s into the area that says "New watch expression". As you can see, finding bugs in a program can take a lot of work. http://win8s.com/how-to/firebug-not-working.html

Comments About the author Dan Maharry Dan Maharry is the editor of DeveloperFusion. I've been working on a small CSS selector for JavaScript, where Firebug with its JavaScript debugger really helped me a lot! Don't worry about the value Firebug displays at this point (it probably says answers is not defined¬Ě). Although there are only four items in the answers array, you can see that the for loop is actually running five times (the value of i).

How To Debug Javascript In Firebug

share|improve this answer answered Nov 28 '11 at 23:39 Matt Gibson 9,03852559 What I'm trying to do is break any time in the enclosure where this.id="someValue"; I've taken over Options Menu[edit] This menu is reachable via the little arrow in the panel tab ( ) or by right-clicking on on the panel tab (since Firebug 1.9). For Source Code, Sample Chapters and other resources, go to http://www.oreilly.com In this tutorial, you'll use Firebug to debug a file that's filled with various types of errors (syntax errors, runtime The page complete_debugger.html contains the completed version of this tutorial.

One step at a time Once the debugger is paused, you can continue execution one line at a time. If you had written this script, you'd probably know just where to look in your code; however, if you were just handed this buggy script, you'd have to hunt around until The array answers is an array of answers that was passed to the function (you can see the array elements listed lower down in the Watch list). How To Debug Javascript In Firefox Firebug So something's funny about how the loop is terminated.

And who are »they«? @asyncio.coroutine vs async def Word for a non-mainstream belief accepted as fact by a sub-culture? Personal Open source Business Explore Sign up Sign in Pricing Blog Support Search GitHub This repository Watch 51 Star 225 Fork 29 firebug/firebug.next Code Issues 91 Pull requests 0 Projects He has covered the latest in software development since the mid 90s. When the page reloads, click the Start Quiz button on the web page.

JavaScript tutorials The HTML5 Drag and Drop API An Introduction To WebSockets First class functions in JavaScript Object Oriented JavaScript JavaScript books Unity 3 Blueprints - A Practical Guide to Indie Javascript Debugger Online In other words, the loop hasn't started, and the i variable hasn't yet been created. Linked 24 Programmatically control breakpoints in Javascript? Next Message by Thread: vvv Home | News | Sitemap | FAQ | advertise | OSDir is an Inevitable website.

How To Debug Javascript In Chrome

When you hit it, look for this.id in the watch pane, right click it and choose 'break on property change'. An array's length property indicates the number of items in the array; in this case there are four, so you should get four radio buttons when the function's completed. How To Debug Javascript In Firebug Then hop over to the Console and watch the calls stream in. Firefox Debugger Download Recent Msgs:guile-user-gnu/2016-11/msg00005.htmlfedora-virt-maint/2016-11/msg00365.htmlcarbon-wso2-architecture/2016-11/msg00105.htmlgeneral/2016-11/msg09436.htmlfedora-development/2016-11/msg00570.htmlscm-fedora-commits/2016-11/msg03328.htmlwxpython-users/2016-11/msg00028.htmlcommits.gnome/2016-11/msg02156.htmldebian-ocaml-maint-debian/2016-11/msg00054.htmldev.mina.apache.org/2016-11/msg00028.html Latest News Stories: Linux 4.0 Kernel Released Google Lets SMTP Certificate Expire Open Crypto Audit Passes TrueCrypt CIA 'tried to crack security of Apple devices' Xen Security Bug: Amazon,

Word for a non-mainstream belief accepted as fact by a sub-culture? Watch Side Panel From FirebugWiki Jump to: navigation, search Watch Side Panel The Watch Side Panel offers the possibility to enter watch expressions allowing to follow changes of variable values while So how do you do this. If your code is a little sluggish, use the JavaScript profiler to measure performance and find bottlenecks fast. How To Debug Javascript In Firefox

And who are »they«? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Reload to refresh your session. this contact form This allows you to see exactly how variables and objects are effected when a particular line is executed.

Why is looping over find's output bad practice? Javascript Debugger Tool I know about using "debugger" in the javascript and putting that after a conditional, and that is useful. You'll notice that to the right of the error message, Firebug lets you know that this error occurred in line 15.

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However, since there's only four items in the answers array, the fifth time through the loop there are no more answers to print: undefined¬Ě is printed because there is no fifth Something must be wrong with the program's logic. A red dot appears to the left of line 46. Firebug Profiler more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

The options are the same as of the DOM Panel. Save the file; return to Firefox and reload the page. This gives me some tools for monitoring a "mutable enclosure" in the second part of the question where they talk about delegates. –Shane Nov 29 '11 at 13:59 add a comment| Sometimes you only want to pause under very specific conditions.

Just click on the variable's current value and you'll be able to type there: Watch an expression Watch expressions are expressions that are evaluated each time execution pauses. Click the Step Over button (see Figure 15-10). In this case, the radio buttons are created within a function named buildAnswers(), whose purpose is to build a series of multiple choice options represented by radio buttons. You've got all the bugs worked out, the artwork has been dropped in, and the users are loving it.